Database Version SQLite Android

I am learning Android. I have one Quote application with SQLite database. I need to give Database version to this application so Whenever I update application, users database also can be get updated. What changes I need to made in this ?

My database Helper/ Handler Class is like below.

public class DataBaseHandler extends SQLiteOpenHelper {
        private static String DB_PATH;
        private static String DB_NAME = "SuccessQuotesNew";
        private SQLiteDatabase myDataBase;
        private final Context myContext;
        public DataBaseHandler(Context context) {

                super(context, DB_NAME, null, 1);
                this.myContext = context;
                DB_PATH = context.getDatabasePath(DB_NAME).toString();
                Log.e("path", DB_PATH);
        }

        public void createDataBase() throws IOException {

                boolean dbExist = checkDataBase();

                if (dbExist) {
                        
                } else {
                        this.getReadableDatabase();

                        try {

                                copyDataBase();

                        } catch (IOException e) {

                                throw new Error("Error copying database");

                        }
                }

        }

        // ==============================================================================

        private boolean checkDataBase() {

                SQLiteDatabase checkDB = null;

                try {
                        String myPath = DB_PATH;
                        checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);

                } catch (SQLiteException e) {

                }

                if (checkDB != null) {

                        checkDB.close();

                }

                return checkDB != null ? true : false;
        }

        private void copyDataBase() throws IOException {

                InputStream myInput = myContext.getAssets().open(DB_NAME);
                String outFileName = DB_PATH;
                OutputStream myOutput = new FileOutputStream(outFileName);
                byte[] buffer = new byte[1024];
                int length;
                while ((length = myInput.read(buffer)) > 0) {
                        myOutput.write(buffer, 0, length);
                }
                myOutput.flush();
                myOutput.close();
                myInput.close();

        }

        // ==============================================================================

        public void openDataBase() throws SQLException {

                // Open the database
                String myPath = DB_PATH;
                myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);

        }

        // ==============================================================================

        @Override
        public synchronized void close() {

                if (myDataBase != null)
                        myDataBase.close();

                super.close();

        }

        // ==============================================================================

        @Override
        public void onCreate(SQLiteDatabase db) {

        }

        // ==============================================================================

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

        }


}

Thanks